#include <bits/stdc++.h>
using namespace std;


double s, x, l, r, now = 0.0, speed = 7.0;
int main() {
    cin >> s >> x;
    l = s - x, r = s + x;
    while (now < l)
        now += speed, speed *= 0.98;
    if (now + speed > r) cout << 'n' << endl;
    else cout << 'y' << endl;
    return 0;
}